62 lines
1.1 KiB
C++
62 lines
1.1 KiB
C++
#include "memorymanager.h"
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#include <QDebug>
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#ifdef Q_OS_WINDOWS
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#include <windows.h>
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#else
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#include <unistd.h>
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#endif
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MemoryManager* MemoryManager::instance_ = nullptr;
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// FIXME: Hardcoded, should be a preference
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const uint64_t MemoryManager::minimum_available_memory_ = 2147483648;
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MemoryManager::MemoryManager(QObject* parent) :
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QObject(parent)
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{
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}
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void MemoryManager::CreateInstance()
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{
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instance_ = new MemoryManager();
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}
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MemoryManager *MemoryManager::instance()
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{
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return instance_;
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}
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void MemoryManager::DestroyInstance()
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{
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delete instance_;
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instance_ = nullptr;
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}
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bool MemoryManager::ShouldFreeMemory()
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{
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return (GetAvailableMemory() < minimum_available_memory_);
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}
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void MemoryManager::ConsumedMemory()
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{
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if (ShouldFreeMemory()) {
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emit FreeMemory();
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}
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}
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uint64_t MemoryManager::GetAvailableMemory()
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{
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#ifdef Q_OS_WINDOWS
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MEMORYSTATUSEX status;
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status.dwLength = sizeof(status);
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GlobalMemoryStatusEx(&status);
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return status.ullAvailPhys;
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#else
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long pages = sysconf(_SC_AVPHYS_PAGES);
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long page_size = sysconf(_SC_PAGE_SIZE);
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return pages * page_size;
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#endif
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}
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